IRT 6500. Includes thermometer, protective case, 21 disposable lens filters, 2 batteries. No. 1 brand among pediatricians and moms (Based on 2012 survey of pediatricians in the US, October 2012 Nielsen data for ear thermometers, and a June 2012 consumer survey on thermometer ownership & usage). Proven more accurate than forehead or rectal (Measurements in detecting temperature changes. Nimah, Marianne M et al. Infrared tympanic thermometry in comparison with other temperature measurement techniques in febrile children. Pediatr Crit Care Med 7.1 (2006): 48-55). Professional technology ensures accuracy every time. Just seconds. Fast, gentle and easy to use. Recommended for infants, children and adults. Why measure in the ear? The ear canal is the best site to measure a fever because of its close proximity to the eardrum, which shares the blood supply of the brain's temperature control center. This site allows for a more accurate reflection of the body's core temperature. Exclusive pre-warmed tip technology is designed to minimize the cooling effect of the tip inside the ear canal, providing accurate measurements time after time. Unique positioning system uses a light and beep to confirm proper positioning. 1X mem. Memory function recalls the last temperature reading. Always replace disposable lens filters to maintain accuracy and hygiene. For infants, children and adults. For home use only. Contents: Braun ThermoScan Ear Thermometer; protective case with lens filter storage; 21 disposable lens filters; 2 AA alkaline batteries. Questions or comments? 1-800-327-7226. www.kaz.com/braun. Patents: www.kaz.com/patents/braun. Uses 2 alkaline batteries (included). Meets the American Society for Testing and Materials (ASTM) accuracy requirement specified in ASTM standard E1965-98, as it pertains to infrared thermometers. 3 year limited warranty (see Use and Care Manual inside for details). Patents:www.kaz.com/patents/braun. Designed in Germany, made in Mexico.